Which part of the tail rotor is least effected by the main rotors?

[Flyting]

This is a question in the JAA question bank which I am struggling to figure out as the correct answer is given as "the bottom"

I remember seeing a video of a simulated scenario in a wind tunnel experiment but I cannot find it anywhere.......

If any one knows or has literature/pictures please help.....

[Thomas coupling]

depends on the direction of turn of the MAIN and TAIL rotors.

[Flyting]

ha...... there are lots of 'depends' when it comes to the JAA exams....

[Savoia]

.
I think that when the JAA and other authorities devise such asinine questions one is obliged to give them the most factually accurate answer which, in this case, could be:

A: The short shaft connecting the tail rotor to its gearbox!

The fact is there are numerous possibles. What a ridiculously open-ended question. Are these guys trying to help test your understadning of aerodynamics or simply befuddle you?

[Pandalet]

What are the other answer choices, out of interest?

[Flyting]

simply befuddle you?

..............exactly
Maybe one day when I win the Euro Lotto I'll take it on to clean it all up





These are the 4 possible answers

1. top
2. bottom
3. advancing side
4. retreating side

and this is the video I was talking about that quite clearly shows the smoke trail going through the bottom half more...at the end of the video

YouTube - ‪Main Rotor tip vortices‬‏

[Epiphany]

Gulf Helicopters.

[Bertie Thruster]

This:

[FSXPilot]

Many moons again they asked a question in an Mechanics exam for helicopters as to how the rotors are engaged is it

a) centrifugal
b) electric
or
c) manual

WTF?

a) is correct if you are in a bell 47
b) is correct in a robbo
c) is correct in an Enstrom

f*****g quiz masters the lot of them!

[pasptoo]

Bertie Thruster - Nice landing! Did you lose the paramedic in the tall grass (or is it weed!)